Would devs PLEASE take a look at this and update the app?
www.tonymacx86.com
I wasted so much time with misleading answers on the forum.
The Unibeast app has a defect and is easily fixable!

Solved > - Unibeast 9.1 - fails creating USB for Legacy Boot (copy of apfs.efi failed...)
Can anyone refer this to the Unibeast team so they can fix it? Why don't you do that yourself ? https://www.tonymacx86.com/threads/unibeast-failure-reporting.85364/

I wasted so much time with misleading answers on the forum.
The Unibeast app has a defect and is easily fixable!